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(1)请用笔画线代替导线,将如图实物电路连接完整
(2)正确连接电路后,用开关试触,灯泡不亮,电压表瞬间满偏,电流表指针几乎不动,电路的故障是
(3)排除故障后,继续实验,闭合开关,移动滑片,当电压表的指针在某电压值时
(4)测量完灯泡的额定功率后,小明又测量了几组数据,计算后发现灯丝电阻随其两端电压的增大而增大,原因是
(评估)小红也利用上述器材对该小灯泡的额定功率进行了测量,实验电路图如图所示,实验结束后,两人对实验进行了交流与评估.
(5)小红的实验结果误差较大,理由是
(6)小明的实验更不容易操作,理由是
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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